people that suffer from roscasea it affects the eyes and babyboomers are dealing with dryness and aging and some of it is basically hormonal. post men put a al women are also -- menopausal women are go also having problem. and because of the factors the eyes could be exposed to swimming and other things. >> and computer? >> the computer, we have to keep the eyes healthy as they look at computers. >> cheryl: you put me on a lot of different things? >> let's start by talking about dry eyes basically. dry eyes, if it contains a lot of different categories. to simplify things, some dry eyes are volume problem. the eye doesn't produce enough tears but the other category is when people come in i'm tearing all the time. they say, you know consistency is important, it's not just the volume. if you don't have enough, it's like a salad dressing, if you don't have enough and ingredient doesn't work, the human tears has the oily part plowed by the glands, it has the liquid part and if you don't have enough of everything, volume doesn't work. so you want to treat dry eyes, you have to see which one